Valve.



J. L. HODGSON.

VALVE.

APPLICATION FILED SEPT- 16, I912.

Patented Jan. 25, 1916.

IIIIIIII c this stop from JOHN LAWRENCE HODGSON, OF LONDON, ENGLAND.

VALVE.

Specification of Letters Patent.

Patented $2111.25, 1916.

Application filed September 16, 1912. Serial No. 720,683.

To all whom it may concern:

Be it known that 1, JOHN LAWRENCE HODGSON, a subject of the King. of England, and residing at 199 High Holborn, London, in the county of Middlesex and country of England, have invented certain new and useful Improvements in Valves, of which the following is a specification.

This invention relates to cut-out valves, and has for its primary object to provide a "alve of this character that is adapted to be inserted. into a fluid carrying main for the purpose of preventing an excessive flow through said main; second, to provide an adjustable stop for controlling the extent of opening of the valve closure so that the same will be acted upon by the flow and moved to its closed position at any predetermined rate of flow through the main; third, to be able to regulate the engaging position of outside of the valve casing; fourth, to provide a scale or other suitable means for readily determining the engaglng position of said stop and so determine the extent of the valve opening; and fifth, to provide a by-pass from one side of the valve seat to the other whereby the pressures on the two sides of the closure may be approxi mately equalized to permit the closure to be moved to its open position after having been closed.

With these and other objects in view, the invention consists of certain novel features .of construction, as will be more fully described and particularly pointed out in the appended claims.

Theaccompanying drawing shows a sectional view of a valve in which the closure is pivotally mounted and weighted to hang normally in wide open position.

Referring to the drawing, 10 designates the valve casing which may be made in any suitable form and of any suitable material, the same being provided with flanges 11, or other suitable means, whereby it may be inserted in a pipe line or conduit through which any liquids or gases may flow.

In the construction illustrated in the drawing 12 designates the closure which upon engaging the seat 22 closes the passageway through the valve, said closure being supported from the pivot 13 through the swinging frame 14, the same being provided with an adjustable weight 15 and a rearwardly extending arm 16, the whole being so supported as to normally hang in open position. A regulating stop pin 17 is threaded through the upper portion of the casing 18, its lower end 19 being adapted to engage the rearwardly extending arm 16 of this closure frame to control the extent of.

opening of said closure. At 20 is a graduated scale along the surface of which the -knife edge collar 21, mounted on the -to be moved to its open position after having been closed. The opening through said bypass is controlled by a valve 24.

' -The principal feature of the invention is the provision of adjustable means whereby the extent of opening of the closure member may be controlled and regulated so that the same will be acted upon by the flow and moved to its closed'position at any predetermined rate of flow through the main. In other words, it is understood that the farther away the closure is from its seat the greater must be the rate of flow to move and close it, and the closer it is to the seat the less will be the rate to close it, therefore by controlling its position or distance from the seat determines the rate of flow that shall be mally in open positlon, an adjustable stopfor controlling the extent of opening of said closure, whereby the latter may be moved to its closed position by the flow at any predetermined rate therethrough and means for controlling the movement of said closure to its seat.

.3. A cut-out valve comprising a casing, a closure pivotally supported therein 'to normally hang in open position, an adjustable stop for controlling and determining the extent of opening of said closure whereby the latter may be moved to its closed position by the flow at any predetermined rate therethrough, and a dash pot for controlling the movement of said closure to its seat.

4. A cut-out valve comprising a'casing, a closure pivotally supported herein normally in open position, an adjustable stop for controlling the extent of opening of said closure, whereby the latter may be moved to its closed position by the flow at any predetermined rate therethrough, and a by-pass connecting both sides of the closure seat for equalizing the pressures on both sides to permit said closure to open after having been closed. v

seat for equalizing the pressures on both sides to permit said closure to open after having been closed.

In testimony whereof I aflix my signature I in presence of two Witnesses.

JOHN LAWRENCE HODGSON.

Witnesses:

CHAS. J. FALCONER, G. I. BRIDGES. 

